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Innovative interface technology from ams significantly reduces mechanical design constraints of true wireless earbuds


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True wireless earbuds from ams

Unique POW:COM technology, a two-pin power and communications connection between earbuds and cradle provides enhanced charging experience

Premstaetten, Austria - ams (SIX: AMS), a leading worldwide supplier of high performance sensor solutions, offers POW:COM, an innovative interface technology which enables POWER and COMMUNICATION between a true wireless earbud and a charging cradle over a two-wire connection. A true wireless earbud previously required as many as six pins to provide both power transfer and communication between the charging cradle and the earbud, compromising the mechanical design of a small form factor that fits comfortably in the user’s ear.

The ams POW:COM interface technology for the first time enables simultaneous data communication with 1kBit/s net data rate and over 150mA charging current supported, far more than applications need today. The POW:COM interface is implemented with the AS3442 host IC in the cradle, and the AS3447 client IC in each earbud. The sophisticated POW:COM protocol developed by ams provides for power transfer at 5V, I2C communication, interrupt signals and up to five GPIOs via a single transmission line between each pair of AS3442 and AS3447 devices.

The communications capability provided by the POW:COM interface supports an enhanced user experience of the charging cradle. For instance, the earbud can request the battery information from the charger cradle and display it on a mobile app.

The POW:COM interface also allows the earbud manufacturer to implement other useful features, such as auto-recharge, automatic pairing of the earbuds with the user’s phone on opening the charging cradle’s case, and accessory firmware updating while charging.

“The POW:COM interface from ams radically reduces the constraints on the design of true wireless earbuds,” said Christian Feierl, Marketing Manager at ams. “If the earbud only needs to accommodate a two-pin connection to the cradle rather than six pins, the designer has much more flexibility to reduce the size of the earbud or to use the space on the surface of the earbud in a way which brings more value to the user.”

The AS3442 and AS3447 POW:COM devices are available now in production volumes. Some brand manufacturers have already included the ams POW:COM devices in their earbuds, with anticipated availability in December, in time for the holiday season.

An evaluation board for the POW:COM interface parts is available on ams online shop. For sample requests or for more technical information, go to www.ams.com/Power-Communication-Interface.

About ams

ams is a global leader in the design and manufacture of advanced sensor solutions. Our mission is to shape the world with sensor solutions by providing a seamless interface between humans and technology. ams’ high-performance sensor solutions drive applications requiring small form factor, low power, highest sensitivity

and multi-sensor integration. Products include sensor solutions, sensor ICs, interfaces and related software for consumer, communications, industrial, medical, and automotive markets.

With headquarters in Austria, ams employs about 11,000 people globally and serves more than 8,000 customers worldwide. ams is listed on the SIX Swiss stock exchange (ticker symbol: AMS). More information about ams can be found at www.ams.com


ams USA Inc.
20450 Stevens Creek Boulevard
Cupertino , CA 95014
United States

Map for ams USA Inc. in Cupertino CA US

For more than 35 years ams has developed and manufactured high performance analog ICs and advanced sensor solutions. Our …
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© Content credits: Some of this page uses material from www.ams.com .